Update

app.py

@@ -13,6 +13,13 @@ demo_conversation2 = [
     {"role": "user", "content": "Hi there!"}
 ]
 
+default_template = """{% for message in messages %}
+{{ "<|im_start|>" + message["role"] + \n + message["content"] + "<|im_end|>\n" }}
+{% endfor %}
+{% if add_generation_prompt %}
+{{ "<|im_start|>assistant\n" }}
+{% endif %}"""
+
 conversations = [demo_conversation1, demo_conversation2]
 
 def apply_chat_template(template):
@@ -25,5 +32,8 @@ def apply_chat_template(template):
         outputs.append(out)
     return tuple(outputs)
 
-iface = gr.Interface(fn=apply_chat_template, inputs="text", outputs=["text"] * len(conversations))
+iface = gr.Interface(
+    fn=apply_chat_template,
+    inputs=gr.TextArea(value=default_template, lines=10, max_lines=30, label="Chat Template"),
+    outputs=["text"] * len(conversations))
 iface.launch()